docker

Docs

• Command line interface https://docs.docker.com/engine/reference/commandline/cli/

Official packages

• https://hub.docker.com/_/httpd/

• https://hub.docker.com/_/nginx/

• https://hub.docker.com/_/elasticsearch/

• https://hub.docker.com/r/million12/varnish/

Selected Tuto

• https://www.digitalocean.com/community/tutorials/docker-explained-using-dockerfiles-to-automate-building-of-images
• Example docker file For httpd image https://github.com/docker-library/httpd/blob/master/2.4/Dockerfile
• https://coreos.com/os/docs/latest/getting-started-with-docker.html

How to

List active docker containers

docker ps -l

Output

CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                                           NAMES
00bb4123c87d        nginx               "nginx -g 'daemon off"   57 minutes ago      Up 57 minutes       0.0.0.0:32769->80/tcp, 0.0.0.0:32768->443/tcp   mysite

Connect to an ubuntu image

docker run -t -i ubuntu /bin/bash

Run and build a docker image

First build the container

```docker build -t my-apache2 .````

• docker command
• build docker command
• -t option to give a name : my-apache2 -t, --tag= Repository name (and optionally a tag) for the image
• . read the content of a docker file in the current directory

Then run it

docker run --name=apache -i -t my-apache2

• docker command
• run docker command
• --name=apache option to set the name of the container (the running container,not the saved image)

docker run + the image name you would like to run + the command to run within the container

It's important to note that containers are designed to stop once the command executed within them has exited. For example, if you ran /bin/echo hello world as your command, the container will start, print hello world and then stop: